Factory Tach Issues.... Looking for some Help

[jaros44sr]

Originally Posted by Six862m6

Thanks jaros. What's it physically connect to on the inside of the cab? The "BRAKE" indicator light in my dash is operated with a bulb on the printed circuit. Does this wire go to the wire harness that connects to the gauges?

David

Lt. Brown comes off of the bulkhead connector, into the main wire bundle at the fuse block and up into the dash gauge connecter. If you look at that connecter, you should see the lt. Brown wire, that connector is all numbered to reflect the location on the factory wire schmatic.....

From there it plugs into the printed circuit board, and is easily traced to the bulb